This causes a serious obstacle in organizations attempting to adopt telecommuting.

The mount was lowered somewhat in 1615, but remained a serious obstacle.

Nevertheless, the wet ditches in front of its old walls presented a serious obstacle to an attacker.

However, other countries had no specific probative measure in the field of infringement, which was a serious obstacle to the enforcement of intellectual property rights.

The fear of responsibility turns out to be a serious obstacle to his maturation into full adulthood (a fact not lost on the character himself).